U.S. health regulators cleared use of retooled Covid-19 vaccines that target the latest versions of Omicron, in preparation for a fall booster campaign that could start within days.
The action by the Food and Drug Administration on Wednesday permits people 12 years and older to receive an additional shot of the vaccine from Pfizer Inc. and BioNTech SE, and people 18 and older to receive a Moderna Inc. booster at least two months after their most recent dose.